The Lineco pH testing pen is a convenient and reliable tool for distinguishing between alkaline paper and board, and acidic paper and board. It is made using chlorophenol red indicator solution, which turns a definite purple color on paper with a pH of 6.5 or higher. Key Features: This material is proudly created and manufactured in the USA. Lineco, a trusted and leading brand, specializes in providing archival and high-quality supplies for art, photography, and framing. Quick assessment: Within seconds, the pen reveals whether your paper products are archival. A clear or yellow line indicates poor quality, while a purple line indicates that the paper is archival. Storage advice: Paper can have a reasonably long lifespan if it has a pH of 6.0 or higher, especially if it is well-made, carefully used, and properly stored. However, in order for paper to last for centuries in today's polluted air, it requires an alkaline reserve, typically characterized by a pH of 7.0 or higher. Ease of use: Simply draw a small line on the material you want to test. On most papers, the drawn line will turn purple if there is an indication of pH neutrality. Important note: This pen is designed solely for pH testing purposes. Inaccurate results may occur when testing colored, coated, or unbuffered materials.

product information:

Attribute

Value

is_discontinued_by_manufacturer

‎No

item_model_number

‎L533-0023

date_first_available

‎June 17, 2003

manufacturer

‎Lineco

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